如何在 PySide6 的框架顶部显示按钮

如果我理解正确，那么实际上一切都很简单，在 widgetB之上绘制一个小部件，使小部件成为小部件A的父级，仅此而已。BA

import sys
'''
from PySide6 import QtWidgets
from PySide6.QtCore import (QCoreApplication, QMetaObject, QSize)
from PySide6.QtWidgets import (QFormLayout, QFrame, QGridLayout,
                               QMainWindow, QPushButton, QSizePolicy, QSpacerItem,
                               QWidget)
'''
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.Qt import *


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        if not MainWindow.objectName():
            MainWindow.setObjectName(u"MainWindow")
        MainWindow.resize(808, 510)
        self.centralwidget = QWidget(MainWindow)
        self.centralwidget.setObjectName(u"centralwidget")
        
        self.gridLayout = QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName(u"gridLayout")
        
        self.frame = QFrame(self.centralwidget)
        self.frame.setObjectName(u"frame")
        self.frame.setFrameShape(QFrame.StyledPanel)
        self.frame.setFrameShadow(QFrame.Raised)

# +++ vvvvv добавил для лучшей визуализации и демонстрации происходящего
        self.image_label = QLabel(alignment=Qt.AlignCenter)
        self.image_label.setObjectName(u"image_label")
        self.image_label.setPixmap(QPixmap("head3.png"))
        lay = QVBoxLayout(self.frame)
        lay.addWidget(self.image_label)

        self.widget = QWidget(self.image_label)
        self.widget.setObjectName(u"widget")
# +++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        
        self.formLayout = QFormLayout (self.widget)                                 # - (self.frame)
        self.formLayout.setObjectName(u"formLayout")
        
        self.pushButton = QPushButton()                                             # - (self.frame)
        self.pushButton.setObjectName(u"pushButton")
        self.pushButton.setMinimumSize(QSize(50, 30))
        self.pushButton.setMaximumSize(QSize(16777214, 16777215))
        self.formLayout.setWidget(1, QFormLayout.LabelRole, self.pushButton)
        
        self.verticalSpacer = QSpacerItem(20, 250, QSizePolicy.Minimum, QSizePolicy.Fixed)
        self.formLayout.setItem(0, QFormLayout.LabelRole, self.verticalSpacer)
        self.gridLayout.addWidget(self.frame, 1, 0, 1, 1)

        MainWindow.setCentralWidget(self.centralwidget)
        self.retranslateUi(MainWindow)
        QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QCoreApplication.translate("MainWindow", u"MainWindow", None))
        self.pushButton.setText(QCoreApplication.translate("MainWindow", u"Test", None))


class MainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setupUi(self)
        self.setMouseTracking(True)

    def resizeEvent(self, event):                                                     # +++ 
        self.widget.resize(self.image_label.size()) 
    
# +++
Stylesheet = """
#centralwidget {
    background-color:  rgb(37, 237, 37);
}
#frame {
    background-color:  rgb(37, 37, 237);
}

#pushButton {
    background-color: rgba(233, 33, 33, 0.7);
    color: #bfbfbf;
}
#image_label {
    background-color:  rgb(137, 137, 237);
}
""" 


if __name__ == "__main__":
    app = QtWidgets.QApplication([])
    
    app.setStyleSheet(Stylesheet)                           # +++
    
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

头3.png